<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    const self = {
        a: 1,
        b: 1,
    }

    let { a, b } = self
    a = 2
    console.log(self.a);
</script>
</body>
</html>
